ANNEX. JOINT MEMORANDUM BY THE AIR STAFF AND GENERAL STAFF ON THE LONDON PARACHUTE EXERCISE, IN REPLY TO THE PRIME MINISTER'S PERSONAL MINUTE M. 723/I. 1. The Joint Intelligence Committee has estimated that the Germans have sufficient troop-carrying aircraft and gliders to enable them to drop a force of 32,000 troops in one lift. In the joint view of the General Staff and Air Staff it is most improbable that the enemy would put the whole of his air-borne effort into an attempt to capture London. Any such attempt would be accompanied by diversionary air-borne attacks on other targets.